#include "cpu.h"
DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
- [GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
- [GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
- [GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
- [GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
+ [GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
+ [GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
+ [GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
+ [GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
/*
* Segments used for calling PnP BIOS have byte granularity.
* They code segments and data segments have fixed 64k limits,
* the transfer segment sizes are set at run time.
*/
- [GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
- [GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
- [GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
- [GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
- [GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
+ /* 32-bit code */
+ [GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
+ /* 16-bit code */
+ [GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
+ /* 16-bit data */
+ [GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
+ /* 16-bit data */
+ [GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
+ /* 16-bit data */
+ [GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
/*
* The APM segments have byte granularity and their bases
* are set at run time. All have 64k limits.
*/
- [GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
+ /* 32-bit code */
+ [GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
/* 16-bit code */
- [GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
- [GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
+ [GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
+ /* data */
+ [GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
- [GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
- [GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
+ [GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
+ [GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
} };
EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
+__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
+
static int cachesize_override __cpuinitdata = -1;
-static int disable_x86_fxsr __cpuinitdata;
static int disable_x86_serial_nr __cpuinitdata = 1;
-static int disable_x86_sep __cpuinitdata;
struct cpu_dev * cpu_devs[X86_VENDOR_NUM] = {};
-extern int disable_pse;
-
static void __cpuinit default_init(struct cpuinfo_x86 * c)
{
/* Not much we can do here... */
static int __init x86_fxsr_setup(char * s)
{
- /* Tell all the other CPUs to not use it... */
- disable_x86_fxsr = 1;
-
- /*
- * ... and clear the bits early in the boot_cpu_data
- * so that the bootup process doesn't try to do this
- * either.
- */
- clear_bit(X86_FEATURE_FXSR, boot_cpu_data.x86_capability);
- clear_bit(X86_FEATURE_XMM, boot_cpu_data.x86_capability);
+ setup_clear_cpu_cap(X86_FEATURE_FXSR);
+ setup_clear_cpu_cap(X86_FEATURE_XMM);
return 1;
}
__setup("nofxsr", x86_fxsr_setup);
static int __init x86_sep_setup(char * s)
{
- disable_x86_sep = 1;
+ setup_clear_cpu_cap(X86_FEATURE_SEP);
return 1;
}
__setup("nosep", x86_sep_setup);
void __init cpu_detect(struct cpuinfo_x86 *c)
{
/* Get vendor name */
- cpuid(0x00000000, &c->cpuid_level,
- (int *)&c->x86_vendor_id[0],
- (int *)&c->x86_vendor_id[8],
- (int *)&c->x86_vendor_id[4]);
+ cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
+ (unsigned int *)&c->x86_vendor_id[0],
+ (unsigned int *)&c->x86_vendor_id[8],
+ (unsigned int *)&c->x86_vendor_id[4]);
c->x86 = 4;
if (c->cpuid_level >= 0x00000001) {
if (c->x86 >= 0x6)
c->x86_model += ((tfms >> 16) & 0xF) << 4;
c->x86_mask = tfms & 15;
- if (cap0 & (1<<19))
+ if (cap0 & (1<<19)) {
c->x86_cache_alignment = ((misc >> 8) & 0xff) * 8;
+ c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
+ }
}
}
+static void __cpuinit early_get_cap(struct cpuinfo_x86 *c)
+{
+ u32 tfms, xlvl;
+ unsigned int ebx;
+
+ memset(&c->x86_capability, 0, sizeof c->x86_capability);
+ if (have_cpuid_p()) {
+ /* Intel-defined flags: level 0x00000001 */
+ if (c->cpuid_level >= 0x00000001) {
+ u32 capability, excap;
+ cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
+ c->x86_capability[0] = capability;
+ c->x86_capability[4] = excap;
+ }
+
+ /* AMD-defined flags: level 0x80000001 */
+ xlvl = cpuid_eax(0x80000000);
+ if ((xlvl & 0xffff0000) == 0x80000000) {
+ if (xlvl >= 0x80000001) {
+ c->x86_capability[1] = cpuid_edx(0x80000001);
+ c->x86_capability[6] = cpuid_ecx(0x80000001);
+ }
+ }
+
+ }
+
+}
/* Do minimum CPU detection early.
Fields really needed: vendor, cpuid_level, family, model, mask, cache alignment.
struct cpuinfo_x86 *c = &boot_cpu_data;
c->x86_cache_alignment = 32;
+ c->x86_clflush_size = 32;
if (!have_cpuid_p())
return;
cpu_detect(c);
get_cpu_vendor(c, 1);
+
+ switch (c->x86_vendor) {
+ case X86_VENDOR_AMD:
+ early_init_amd(c);
+ break;
+ case X86_VENDOR_INTEL:
+ early_init_intel(c);
+ break;
+ }
+
+ early_get_cap(c);
}
static void __cpuinit generic_identify(struct cpuinfo_x86 * c)
{
u32 tfms, xlvl;
- int ebx;
+ unsigned int ebx;
if (have_cpuid_p()) {
/* Get vendor name */
- cpuid(0x00000000, &c->cpuid_level,
- (int *)&c->x86_vendor_id[0],
- (int *)&c->x86_vendor_id[8],
- (int *)&c->x86_vendor_id[4]);
+ cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
+ (unsigned int *)&c->x86_vendor_id[0],
+ (unsigned int *)&c->x86_vendor_id[8],
+ (unsigned int *)&c->x86_vendor_id[4]);
get_cpu_vendor(c, 0);
/* Initialize the standard set of capabilities */
init_scattered_cpuid_features(c);
}
- early_intel_workaround(c);
-
#ifdef CONFIG_X86_HT
c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
#endif
/*
* This does the hard work of actually picking apart the CPU stuff...
*/
-static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
+void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
{
int i;
generic_identify(c);
- printk(KERN_DEBUG "CPU: After generic identify, caps:");
- for (i = 0; i < NCAPINTS; i++)
- printk(" %08lx", c->x86_capability[i]);
- printk("\n");
-
- if (this_cpu->c_identify) {
+ if (this_cpu->c_identify)
this_cpu->c_identify(c);
- printk(KERN_DEBUG "CPU: After vendor identify, caps:");
- for (i = 0; i < NCAPINTS; i++)
- printk(" %08lx", c->x86_capability[i]);
- printk("\n");
- }
-
/*
* Vendor-specific initialization. In this section we
* canonicalize the feature flags, meaning if there are
* we do "generic changes."
*/
- /* TSC disabled? */
- if ( tsc_disable )
- clear_bit(X86_FEATURE_TSC, c->x86_capability);
-
- /* FXSR disabled? */
- if (disable_x86_fxsr) {
- clear_bit(X86_FEATURE_FXSR, c->x86_capability);
- clear_bit(X86_FEATURE_XMM, c->x86_capability);
- }
-
- /* SEP disabled? */
- if (disable_x86_sep)
- clear_bit(X86_FEATURE_SEP, c->x86_capability);
-
- if (disable_pse)
- clear_bit(X86_FEATURE_PSE, c->x86_capability);
-
/* If the model name is still unset, do table lookup. */
if ( !c->x86_model_id[0] ) {
char *p;
c->x86, c->x86_model);
}
- /* Now the feature flags better reflect actual CPU features! */
-
- printk(KERN_DEBUG "CPU: After all inits, caps:");
- for (i = 0; i < NCAPINTS; i++)
- printk(" %08lx", c->x86_capability[i]);
- printk("\n");
-
/*
* On SMP, boot_cpu_data holds the common feature set between
* all CPUs; so make sure that we indicate which features are
boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
}
+ /* Clear all flags overriden by options */
+ for (i = 0; i < NCAPINTS; i++)
+ c->x86_capability[i] ^= cleared_cpu_caps[i];
+
/* Init Machine Check Exception if available. */
mcheck_init(c);
+
+ select_idle_routine(c);
}
void __init identify_boot_cpu(void)
identify_cpu(&boot_cpu_data);
sysenter_setup();
enable_sep_cpu();
- mtrr_bp_init();
}
void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
}
#endif
+static __init int setup_noclflush(char *arg)
+{
+ setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
+ return 1;
+}
+__setup("noclflush", setup_noclflush);
+
void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
{
char *vendor = NULL;
printk("\n");
}
+static __init int setup_disablecpuid(char *arg)
+{
+ int bit;
+ if (get_option(&arg, &bit) && bit < NCAPINTS*32)
+ setup_clear_cpu_cap(bit);
+ else
+ return 0;
+ return 1;
+}
+__setup("clearcpuid=", setup_disablecpuid);
+
cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
/* This is hacky. :)
* They will insert themselves into the cpu_devs structure.
* Then, when cpu_init() is called, we can just iterate over that array.
*/
-
-extern int intel_cpu_init(void);
-extern int cyrix_init_cpu(void);
-extern int nsc_init_cpu(void);
-extern int amd_init_cpu(void);
-extern int centaur_init_cpu(void);
-extern int transmeta_init_cpu(void);
-extern int nexgen_init_cpu(void);
-extern int umc_init_cpu(void);
-
void __init early_cpu_init(void)
{
intel_cpu_init();
nexgen_init_cpu();
umc_init_cpu();
early_cpu_detect();
-
-#ifdef CONFIG_DEBUG_PAGEALLOC
- /* pse is not compatible with on-the-fly unmapping,
- * disable it even if the cpus claim to support it.
- */
- clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
- disable_pse = 1;
-#endif
}
/* Make sure %fs is initialized properly in idle threads */
-struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
+struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
{
memset(regs, 0, sizeof(struct pt_regs));
- regs->xfs = __KERNEL_PERCPU;
+ regs->fs = __KERNEL_PERCPU;
return regs;
}
* it's on the real one. */
void switch_to_new_gdt(void)
{
- struct Xgt_desc_struct gdt_descr;
+ struct desc_ptr gdt_descr;
gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
gdt_descr.size = GDT_SIZE - 1;
if (cpu_has_vme || cpu_has_tsc || cpu_has_de)
clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
- if (tsc_disable && cpu_has_tsc) {
- printk(KERN_NOTICE "Disabling TSC...\n");
- /**** FIX-HPA: DOES THIS REALLY BELONG HERE? ****/
- clear_bit(X86_FEATURE_TSC, boot_cpu_data.x86_capability);
- set_in_cr4(X86_CR4_TSD);
- }
load_idt(&idt_descr);
switch_to_new_gdt();
BUG();
enter_lazy_tlb(&init_mm, curr);
- load_esp0(t, thread);
+ load_sp0(t, thread);
set_tss_desc(cpu,t);
load_TR_desc();
load_LDT(&init_mm.context);
projects / linux-flexiantxendom0-3.2.10.git / blobdiff